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6bc1f546de
The default USB controller is not sent to destination as the older versions of libvirt(0.9.4 or earlier as I see in commit log of 409b5f54) didn't support them. For some archs where the support started much later can safely send the USB controllers without this worry. So, send the controller to destination for all archs except x86. Moreover this is not very applicable to x86 as the USB controller has model ich9_ehci1 on q35 and for pc-i440fx, there cant be any slots before USB as it is fixed on slot 1. The patch fixes a bug that, if the USB controller happens to occupy a slot after disks/interfaces and one of them is hot-unplugged, then the default USB controller added on destination takes the smallest slot number and that would lead to savestate mismatch and migration failure. Seen and verified on PPC64. Signed-off-by: Shivaprasad G Bhat <sbhat@linux.vnet.ibm.com> (cherry picked from commit 192a53e07c5fefd9dad2f310886209b76dcc5d83)
LibVirt : simple API for virtualization
Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.
Daniel Veillard <veillard@redhat.com>